Revert "kbuild/Makefile: Prepare for using macros in inline assembly code to work around asm() related GCC inlining bugs"

This reverts commit 77b0bf55bc.

See this commit for details about the revert:

  e769742d35 ("Revert "x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs"")

 Conflicts:
	arch/x86/Makefile

Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Borislav Petkov <bp@alien8.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Juergen Gross <jgross@suse.com>
Cc: Richard Biener <rguenther@suse.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Nadav Amit <namit@vmware.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/Makefile

@@ -232,13 +232,6 @@ archscripts: scripts_basic
 archheaders:
 	$(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all
 
-archmacros:
-	$(Q)$(MAKE) $(build)=arch/x86/kernel arch/x86/kernel/macros.s
-
-ASM_MACRO_FLAGS = -Wa,arch/x86/kernel/macros.s
-export ASM_MACRO_FLAGS
-KBUILD_CFLAGS += $(ASM_MACRO_FLAGS)
-
 ###
 # Kernel objects
 

arch/x86/kernel/macros.S

@@ -1,7 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-
-/*
- * This file includes headers whose assembly part includes macros which are
- * commonly used. The macros are precompiled into assmebly file which is later
- * assembled together with each compiled file.
- */